Valve comprising an equalizing chamber, alpha main, and an auxiliary valve



March 1, 1932. v F. WAGNER 1,847,107

VALVE COMPRISING AN EQUALIZING GHAIIBEii, A IAIN, AND AN AUXILIARY VALVEOriginal Filed June 1?, 1925 I s I renaming". 1, 1932 UNITED STATESPATENT OFFICE .1

rm'rz wnemflor nmm mcnrnnrsrnn, Grammy, assrenoa 'ro rmrz J P am) co. orBERLIN, GERMANY WAGNER VALVE GOIIBISDIG .EQUAIJZING CHAMBER, A. MAIN,AND .AN'AUXILIABY VALVE I Original a nmuun n ea June 17, 1911s, No.116,643, and meerman m 22, 1826. Divided and.

this apifllcatlen fled J 'anuary,19, 1927. Serialj'o. 168,128.

vention is illustrated in axial section byway I My invention relatesto..valves comprising an equalizing chamber, a main and'an aux1liary,valve, in which the main and auxiliary valves are connected mechanicallas well as by a fluid coupling, the latter being eifected by throttlingthe passage between the equalizing chamber and the fluid inlet. i

It is anobject of my inventionto provide means by which the action ofthe throttling device may be adjusted within very fine l1m1 ts and to.this end I provide a piston in the said passage which is adapted tocooperate with a check on the main valve, and I provide aperforation orperforations in the said piston through which the fluid flows from theinlet to the eqfializing chamber. It will be understood that the area ofthe perforation or perforations may be throttled by reducing theclearance between the piston and its check on the main valve below thewidth of the perforation or perforations, and that the throt tlingaction will increase until the piston engagas below the check, eflectingmechanical coupling between the main and auxiliary valve and eliminatingthe fluid coupling.

It is another object of my invention to eliminate the necessity of veryaccurate machining as required valves of the general type referred to inwhich variations in the coaxial relations of the spindle and the annularrestriction of the passage connecting the equalizing chamber and thefluid inlet must be strictly eliminated as they would generate onesidedforces on the main valve. t It has been proposed 'to provide aperforated piston on-the spindle of' an auxiliary valve, the pistonfitting a bore in the main valve. The piston, however, does notcoopcrate with a check on the main valve and so is unable to'throttlethe passage between the equalizing chamber and the fluid inlet.

It will be understood that the area of the perforation or perforationsmay be readily.

adapted to given conditions by boring or inserting liners in them-sothat any desired operation of the fluid coupling may be achieved. Inthis manner, hammering of the main valve is absolutely prevented. 1

In the drawings a valve embodying myinf ,,example. 1 is thevalve casing,2 is a liner inserted in the casmg, 3 is the main valve, and a is apiston at the upper end of'the main valve which fits the liner. 7 is theseat of the main valve in the casing 1, 4 is the auxiliary valve wh1chis seated above a passage 6- in the bottom of the main valve 3, 5 is theequalizing chamber which is constituted partly by the casrng above thepiston a and .partlyby the cavity of the main valve body, 19 is the delivery pipe below the seat- 7 of the main valve,

10 is the spindle of the auxiliary valve which pro ects from a stuflingbox in the cover of the casing 1, and.13 is the fluid inlet pipe.

Fluid under pressure, for instance, steam,

from the pipe 13 is admitted into tubes 12 through ports .8'in the liner2. The tubes 12 are inserted, in the manner of stays, in arms of themain valve body andmorres onding holes in a fluid chamber 9 which isplaced inthe main valve.

11 is the bottom plate of the chamber fl through which the spindle 10passes, 20 is a check constituted by-the suraced top of the chamber 9,and 18 are pas sages connecting the top of the chamber behow 5the check20 with the equalizing chamer 31 is a piston secured on, or integralwith, the spindle 10 of the auxiliary valve 4 which fits comparativelytightly'in the walls of the chamber 9 but, if desired, maybe providedwith packin rings or the like. The pistonis perforate at 32 and twoperforations are shown by way of example but an number, or only a sin leperforation, may e provided. The wigth of the perforations may be equalor several perforations may be of various widths.

The second throttling device is constituted partly by the lower ends ofthe ports 8 which are V-shaped or otherwise reduced in combined actionof these reduced areas t rottled so as to prevent its lifting the valve3 brusquely which would cause hammering.

When the auxiliary valve 4 is openedthe distance between the upper faceof the piston 31 and the check 20 is gradually reduced while the mainvalve 3 is lifted from its seat 7 by the fluid coupling, and the passagebetween the chamber 9 and the equalizing chamber 5 is reduced graduallyuntil finally the piston engages the check and eflects mechanical couling. Due to the gradual reduction-or increase, as the case may beof theefl'ective area of the perforation or perforations 32, which, asmentioned, may be selected for any given valve and its conditions ofoperation, hammering of the check on the piston is prevented when thepiston is moved toward, and when it is moved away from, the check 20.

The arrangement of the perforations may be as desired and it is notnecessary that two perforations should be diametrally opposite as shownby way of example.

I claim:

A valve comprising a casing, means for supplying fluid under pressure'tosaid casing, an equalizing chamber, a main valve and an auxiliary valveinsaid casing, means for operating said auxiliary valve, a cylinder insaid main valve connected wth said fluid supplying means and saidequalizing chamber, a perforated piston fitted in said cylinder and.adapted to be reciprocated therein by said means for operating saidauxiliary valve, and an abutment on said main valve near the end of saidcylinder which is adjacent said equalizing chamber, said abutmentbeingadapted to throttle the perforation in said piston and to gaged bysaid piston. I

In testimony whereof I aflix my si ature.

' FRITZ WAG R.

be positivelyv en-

